diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index c7d72ca9..759d0bb6 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1063,6 +1063,7 @@ JavaScript:
   - ._js
   - .bones
   - .es6
+  - .frag
   - .jake
   - .jsfl
   - .jsm
diff --git a/lib/linguist/samples.json b/lib/linguist/samples.json
index 89d40492..20d9ded3 100644
--- a/lib/linguist/samples.json
+++ b/lib/linguist/samples.json
@@ -167,6 +167,7 @@
     ],
     "GLSL": [
       ".fp",
+      ".frag",
       ".glsl"
     ],
     "Gnuplot": [
@@ -230,6 +231,7 @@
       ".java"
     ],
     "JavaScript": [
+      ".frag",
       ".js",
       ".script!"
     ],
@@ -710,8 +712,8 @@
       ".gemrc"
     ]
   },
-  "tokens_total": 609672,
-  "languages_total": 746,
+  "tokens_total": 609975,
+  "languages_total": 750,
   "tokens": {
     "ABAP": {
       "*/**": 1,
@@ -23546,14 +23548,14 @@
       "////": 4,
       "High": 1,
       "quality": 2,
-      "(": 386,
+      "(": 435,
       "Some": 1,
       "browsers": 1,
       "may": 1,
       "freeze": 1,
       "or": 1,
       "crash": 1,
-      ")": 386,
+      ")": 435,
       "//#define": 10,
       "HIGHQUALITY": 2,
       "Medium": 1,
@@ -23580,7 +23582,7 @@
       "RAGGED_LEAVES": 5,
       "DETAILED_NOISE": 3,
       "LIGHT_AA": 3,
-      "//": 36,
+      "//": 38,
       "sample": 2,
       "SSAA": 2,
       "HEAVY_AA": 2,
@@ -23590,12 +23592,12 @@
       "Configurations": 1,
       "#ifdef": 14,
       "#endif": 14,
-      "const": 18,
-      "float": 103,
+      "const": 19,
+      "float": 105,
       "eps": 5,
       "e": 4,
       "-": 108,
-      ";": 353,
+      ";": 383,
       "PI": 3,
       "vec3": 165,
       "sunDir": 5,
@@ -23614,13 +23616,13 @@
       "tonemapping": 1,
       "mod289": 4,
       "x": 11,
-      "{": 61,
+      "{": 82,
       "return": 47,
       "floor": 8,
       "*": 115,
       "/": 24,
-      "}": 61,
-      "vec4": 72,
+      "}": 82,
+      "vec4": 73,
       "permute": 4,
       "x*34.0": 1,
       "+": 108,
@@ -23821,7 +23823,7 @@
       "shadow": 4,
       "taken": 1,
       "for": 7,
-      "int": 7,
+      "int": 8,
       "rayDir*t": 2,
       "res": 6,
       "res.x": 3,
@@ -23924,8 +23926,8 @@
       "iResolution.x/iResolution.y*0.5": 1,
       "rd.x": 1,
       "rd.y": 1,
-      "void": 5,
-      "main": 3,
+      "void": 31,
+      "main": 5,
       "gl_FragCoord.xy": 7,
       "*0.25": 4,
       "*0.5": 1,
@@ -23937,7 +23939,38 @@
       "col*exposure": 1,
       "x*": 2,
       ".5": 1,
-      "gl_FragColor": 2,
+      "gl_FragColor": 3,
+      "#version": 2,
+      "core": 1,
+      "cbar": 2,
+      "cfoo": 1,
+      "CB": 2,
+      "CD": 2,
+      "CA": 1,
+      "CC": 1,
+      "CBT": 5,
+      "CDT": 3,
+      "CAT": 1,
+      "CCT": 1,
+      "norA": 4,
+      "norB": 3,
+      "norC": 1,
+      "norD": 1,
+      "norE": 4,
+      "norF": 1,
+      "norG": 1,
+      "norH": 1,
+      "norI": 1,
+      "norcA": 2,
+      "norcB": 3,
+      "norcC": 2,
+      "norcD": 2,
+      "head": 1,
+      "of": 1,
+      "cycle": 2,
+      "norcE": 1,
+      "lead": 1,
+      "into": 1,
       "NUM_LIGHTS": 4,
       "AMBIENT": 2,
       "MAX_DIST": 3,
@@ -23946,7 +23979,7 @@
       "lightColor": 3,
       "[": 29,
       "]": 29,
-      "varying": 3,
+      "varying": 4,
       "fragmentNormal": 2,
       "cameraVector": 2,
       "lightVector": 4,
@@ -23974,7 +24007,11 @@
       "specularDot": 2,
       "sample.rgb": 1,
       "sample.a": 1,
-      "#version": 1,
+      "static": 1,
+      "char*": 1,
+      "SimpleFragmentShader": 1,
+      "STRINGIFY": 1,
+      "FrontColor": 2,
       "kCoeff": 2,
       "kCube": 2,
       "uShift": 3,
@@ -26661,15 +26698,15 @@
       ".internalBuildGeneratedFileFrom": 1
     },
     "JavaScript": {
-      "function": 1210,
-      "(": 8513,
-      ")": 8521,
-      "{": 2736,
-      ";": 4052,
+      "function": 1212,
+      "(": 8518,
+      ")": 8526,
+      "{": 2738,
+      ";": 4056,
       "//": 410,
       "jshint": 1,
       "_": 9,
-      "var": 910,
+      "var": 911,
       "Modal": 2,
       "content": 5,
       "options": 56,
@@ -26679,15 +26716,15 @@
       ".delegate": 2,
       ".proxy": 1,
       "this.hide": 1,
-      "this": 577,
-      "}": 2712,
+      "this": 578,
+      "}": 2714,
       "Modal.prototype": 1,
       "constructor": 8,
       "toggle": 10,
-      "return": 944,
-      "[": 1459,
+      "return": 945,
+      "[": 1461,
       "this.isShown": 3,
-      "]": 1456,
+      "]": 1458,
       "show": 10,
       "that": 33,
       "e": 663,
@@ -26715,7 +26752,7 @@
       "hide": 8,
       "body": 22,
       "modal": 4,
-      "-": 705,
+      "-": 706,
       "open": 2,
       "fade": 4,
       "hidden": 12,
@@ -27375,6 +27412,12 @@
       "_results.push": 2,
       "math.cube": 2,
       ".slice": 6,
+      "window": 18,
+      "angular": 1,
+      "Array.prototype.last": 1,
+      "this.length": 41,
+      "app": 3,
+      "angular.module": 1,
       "A": 24,
       "w": 110,
       "ma": 3,
@@ -27513,7 +27556,6 @@
       "c.prototype": 1,
       "init": 7,
       "this.context": 17,
-      "this.length": 40,
       "s.body": 2,
       "this.selector": 16,
       "Ta.exec": 1,
@@ -28074,7 +28116,6 @@
       "scrollTo": 1,
       "CSS1Compat": 1,
       "client": 3,
-      "window": 16,
       "document": 26,
       "window.document": 2,
       "navigator": 3,
@@ -29728,7 +29769,6 @@
       "week": 1,
       "bK": 1,
       "about": 1,
-      "app": 2,
       "storage": 1,
       "extension": 1,
       "widget": 1,
@@ -30907,6 +30947,7 @@
       "js": 1,
       "classes.join": 1,
       "this.document": 1,
+      "window.angular": 1,
       "PEG.parser": 1,
       "quote": 3,
       "result0": 264,
@@ -65817,7 +65858,7 @@
     "Game Maker Language": 13310,
     "GAP": 9944,
     "GAS": 133,
-    "GLSL": 3766,
+    "GLSL": 4033,
     "Gnuplot": 1023,
     "Gosu": 410,
     "Grammatical Framework": 10607,
@@ -65835,7 +65876,7 @@
     "Ioke": 2,
     "Jade": 3,
     "Java": 8987,
-    "JavaScript": 76934,
+    "JavaScript": 76970,
     "JSON": 183,
     "JSON5": 57,
     "JSONiq": 151,
@@ -65999,7 +66040,7 @@
     "Game Maker Language": 13,
     "GAP": 7,
     "GAS": 1,
-    "GLSL": 3,
+    "GLSL": 5,
     "Gnuplot": 6,
     "Gosu": 4,
     "Grammatical Framework": 41,
@@ -66017,7 +66058,7 @@
     "Ioke": 1,
     "Jade": 1,
     "Java": 6,
-    "JavaScript": 20,
+    "JavaScript": 22,
     "JSON": 4,
     "JSON5": 2,
     "JSONiq": 2,
@@ -66134,5 +66175,5 @@
     "YAML": 2,
     "Zephir": 2
   },
-  "md5": "e48a5efc06906356916c94d4f2344863"
+  "md5": "ef1795e3585ee02f479767c6a071eb2f"
 }
\ No newline at end of file
diff --git a/samples/GLSL/SimpleLighting.gl2.frag b/samples/GLSL/SimpleLighting.gl2.frag
new file mode 100644
index 00000000..bb851f86
--- /dev/null
+++ b/samples/GLSL/SimpleLighting.gl2.frag
@@ -0,0 +1,9 @@
+static const char* SimpleFragmentShader = STRINGIFY(
+
+varying vec4 FrontColor;
+
+void main(void)
+{
+    gl_FragColor = FrontColor;
+}
+);
diff --git a/samples/GLSL/recurse1.frag b/samples/GLSL/recurse1.frag
new file mode 100644
index 00000000..66b4c3fe
--- /dev/null
+++ b/samples/GLSL/recurse1.frag
@@ -0,0 +1,48 @@
+#version 330 core
+
+// cross-unit recursion
+
+void main() {}
+
+// two-level recursion
+
+float cbar(int);
+
+void cfoo(float)
+{
+	cbar(2);
+}
+
+// four-level, out of order
+
+void CB();
+void CD();
+void CA() { CB(); }
+void CC() { CD(); }
+
+// high degree
+
+void CBT();
+void CDT();
+void CAT() { CBT(); CBT(); CBT(); }
+void CCT() { CDT(); CDT(); CBT(); }
+
+// not recursive
+
+void norA() {}
+void norB() { norA(); }
+void norC() { norA(); }
+void norD() { norA(); }
+void norE() { norB(); }
+void norF() { norB(); }
+void norG() { norE(); }
+void norH() { norE(); }
+void norI() { norE(); }
+
+// not recursive, but with a call leading into a cycle if ignoring direction
+
+void norcA() { }
+void norcB() { norcA(); }
+void norcC() { norcB(); }
+void norcD() { norcC(); norcB(); } // head of cycle
+void norcE() { norcD(); } // lead into cycle
diff --git a/samples/JavaScript/intro.js.frag b/samples/JavaScript/intro.js.frag
new file mode 100644
index 00000000..a4e06b08
--- /dev/null
+++ b/samples/JavaScript/intro.js.frag
@@ -0,0 +1,7 @@
+(function(window, angular) {
+
+Array.prototype.last = function() {
+    return this[this.length-1];
+};
+
+var app = angular.module('ConwayGameOfLife', []);
diff --git a/samples/JavaScript/outro.js.frag b/samples/JavaScript/outro.js.frag
new file mode 100644
index 00000000..8634f6ed
--- /dev/null
+++ b/samples/JavaScript/outro.js.frag
@@ -0,0 +1,3 @@
+
+})(window, window.angular);
+